Educational
FORECAST SOL: Normal green MAG: Normal green ION: Normal green Looking for something? Site search go to search page
HomeEducationalSpace DebrisNear-Earth ObjectsNEO Distances Wednesday, Oct 01 2014 12:13 UT
Space Debris

NEO Distances

When a report is made of a close approach of an asteroid to the Earth, distances are often specified in Astronomical Units (AU) or possibly in Lunar Distances (LD). The table below relates these two units to the more familiar unit of the kilometre, and also to the Earth's radius (Re).

Note that 1 AU is just under 150 million km, and 1 LD = 0.00256 AU ~ 60 Re.

AU LD KM Earth Radii
0.00010.0414,9602
0.00020.0829,9205
0.00030.1244,8797
0.00040.1659,8399
0.00050.1974,79912
0.00060.2389,75914
0.00070.27104,71916
0.00080.31119,67819
0.00090.35134,63821
0.0010.39149,59823
0.0020.78299,19647
0.0031.17448,79470
0.0041.56598,39294
0.0051.95747,989117
0.0062.34897,587141
0.0072.721,047,185164
0.0083.111,196,783188
0.0093.51,346,381211
0.013.891,495,979234
0.027.782,991,957469
0.0311.684,487,936703
0.0415.575,983,915938
0.0519.467,479,8941172
0.0623.358,975,8721407
0.0727.2410,471,8511641
0.0831.1311,967,8291876
0.0935.0313,463,8092110
0.138.9214,959,7872345
0.277.8329,919,5744690
0.3116.7544,879,3647034
0.4155.6759,839,1489379
0.5194.5974,798,93611724
0.6233.589,758,72814069
0.7272.42104,718,51216414
0.8311.34119,678,29618758
0.9350.26134,638,08021103

Material prepared by John Kennewell

go to top of page